Variable power and speed transmission



Feb. 8, 1949. H. c. BARNACK VARIABLE POWERV AND SPEED TRANSMISSION' Filed March 14, 1945 2 Sheets-Sheet 1 ATTORNEYS Feb. 8, 1949. H. C, BARNACK 2,461,022

VARIABLE POWER AND SPEED TRANSMISSION l Fild March 14, 1945 v 2 sheets-sheet 2 INVENTOR.

N g I Patented Feb. 8, 1949 VARIABLE POWER AND SPEED TRANSMISSION v The invention relatesV` v:mission `for variable power .and :speeditransmisfsicns. A

i The primary object of theiinvention is theiprovision of mechanism of this character, ywllerein the construction 4thereofis .novel and unique in the arran-gementpf parts, "which are few in number, so as to be compact 4sand least liable to -Lget out of order, .the .mechanism b'eing- :effective for transmission that turns from a ratio of 1-0 or stillV position, to a ratio of 1-1 or direct drive, which latter drive is had without shifting gears, and the' ratio change is continuous and smooth, eliminating the shifting of numerous gears, as is a'fact in common practice with the present day transmissions.

Another object of the invention is the provision of mechanism of this character, wherein variable selective power and speed transmission may be had without gear shifting operations, the mechanism being confined within a housing containing uid, the parts operating therein, so that Wear thereon is at a minimum, as they will at all times be thoroughly lubricated automatically.

A further object `of the invention is the provision of mechanism 'of this character, which is simple in construction, thoroughly reliable and eicient in operation, strong, durable, readily and easily controlled, particularly designed for motor vehicle service, and inexpensive to manufacture and install.

With these and other objects in View the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which show the preferred embodiment of the invention, and pointed out in the claim hereunto appended.

In the accompanying drawings- Figure 1 is a longitudinal central section of a fluid power transmission mechanism constructed in accordance with the invention.

Figure 2 is a sectional View taken on the line 2--2 of Figure 1 looking in the direction of the arrows.

Figure 3 is a Asectional view taken on the line 3-3 of Figure 1 looking in the direction of the arrows.

Figure 4 is a sectional view taken on the line 4-4 of Figure 1 looking in the direction ofthe arrows.

Figure 5 is a sectiona1 viewtaken on the line .i clam. (o1. .v4-6811) to fa transmission A mechanism for power driven units, and more es- ",pecially .to a hydraulically voperated gear :trans- 15-5 of Figure l 7looking Ain `the :directioniof the .aff OWS Figure .6 is asectional View talren on the line `6---6` .of Figure :1 looking the ,direction :of the arrows.

vSimilarreference :characters indicate corresponding-'parts throughout `-theseveral views-in .the

. drawings Referring :the ,drawings., A `designates igen- Verally thetransmission mechanism in its-entirety constructed 'in accordance with the invention, v

and comprises a casing or housing I0, forming a combined uid and gear container, it being sectional and involving a removable cover or top I I, while opposite ends of this casing or housing Il) have built therewith'packing glands I2, which are alignedwith each other. Extending through the glands I2 are the driving and driven shafts I3 and I4, respectively. The shaft I3. is operated from a power unit, not shown, and the power from the latter is taken off from the driven shaft I4 in any selected manner.

The driving shaft I3 interiorly of the casing or housing Ill is formed with a cross-journal I5,

. with arbor terminals I6 on which are rotatably fitted bevel gears I1, enmesh with bevel gears I8 -and I9, respectively, the latter gear I9 being iixed to the. driven shaft I4, While the gear I8 is loose on the driving shaft I3. 'Ilhe hub 20 of this gear I8 has a slidablespline or clutch coupling at 2| .to an extension sleeve 22 free about the driving shaft I3 and in bearing fitting at 23 with a double web spider 24, which is unitary with the casing or housing I0 interiorly thereof.

On the power or driving shaft I3 and the eX- tension sleeve 22 are the nned fluid impact disk-:like members 25 Vand 26, respectively, the member 25 fast to the driving shaft being formed Vwith the exposed radial ns 21, while the number 25 integral with the extension sleeve 22 has the enclosedradial fins 28. The member yZis movable toward and away fromthe member 25,

the fins thereof being in confronting relation to f the output shaft starts turning in a low gear 3 ratio and the speed of ouput gradually increases. In low speed output the member 26 turns faster than the member 25, both turning clockwise, and as the member 26 slows down to the corresponding speed of the member 25, the output shaft increases in speed, and thus the level gears l1 stop turning in fdireet drive and the Whole assembly turns as one unit.

From the foregoing it is thought that the construction and manner of operation of the mechanism A will be clearly understood, and therefore, a more extended explanation has been I omitted for the sake of brevity.

What is claimed is:

A transmission consisting of Va fluid-tight casing, uid therein, driving and'driven shafts axially aligned with each other ,and rotatable mounted in opposite ends of and extending into said casing, the ends of said shafts being axially spaced a predetermined distance from each other in said casing, a cross-shaft secured to said driving shaft, a pair of bevel gears journalled on said crossshaft, a rst bevel gear xed to-said driven shaft and meshing with said ypair of bevel gears, a second bevel gea-r rotatably mounted on said driving 'shaft and meshing with said pairl of bevel gears, a fluid impact driven member having a series of radially-disposed grooves and slidably journalled upon said driving shaft, means extending from 'said impact driven member slidably keying the same to said second bevel gear for driving the same while allowing relative axial movement between said impact driven member and said gear, a driving impact member having radially-disposed ns complementary to said radially-disposed grooves and adapted to be received thereby, said driving impact member being ilxed to said driving shaft, means slidably'engaging said driven impact member for shifting the same relative to said driving impact member.

HENRY C. BARNACK.

l REFERENCES CITED The following references are of record in the 15 le of this patent:

UNITED STATES PATENTS Number Name Date 1,242,974 Pinckney Oct` 16, 1917 20 1,270,323 Radcliffe June 25, 1918 1,764,849 OConnor June 17, 1930 2,073,357 Wemp Mar. 9, 1937 2,129,884 Swan Sept. 13, 1938 2,336,055 Bacon Dec. 7, 1943 25 2,336,167 Dillon Dec, 7, 1943 2,383,981 Lysholm Sept. 4, 1945 2,385,059 Buthe Sept, 18, 1945 FOREIGN'PAI'ENTS 3g Number Country Date France Oct. 7, 1929 

